Ilona Sylvester, M.D.
Internal Medicine Physician · Ventura, CA
Ilona Sylvester, M.D. is an internal medicine physician with a practice address in Ventura, California, and NPI 1215959291, issued on Jul 25, 2006. Check the license (California A055316, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ilona Sylvester
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A055316 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Wells RD, Ventura, CA 93004
- Phone
- (805) 659-1740
- Enumerated
- Jul 25, 2006
- Record last updated
- Mar 22, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (805) 659-9959
- Medicaid IDs
- RHM18553H CA
RHM08609F CA
RHM08608F CA
ZZT40394F CA - Entity
- Type 1 · individual
Also registered at 200 S Wells RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fouzia Aftab, MDFamily Medicine Physician1013938109
- Sandra Alvarado, PHDClinical Psychologist1912274713
- Syd Bakshandeh, M.D.Internal Medicine Physician1982820932
- Laureen Berry, FNPFamily Nurse Practitioner1124496203
- Marisela Cabral-Centeno, MSWClinical Social Worker1255597787
- Julia Callaghan, ASW36282Mental Health Counselor1356696140
Verify Ilona Sylvester in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A055316Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68 internal medicine physician records list a practice address in Ventura
They are 68 of the 4,435 NPPES records with a practice address in Ventura, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 68 in Ventura → All 17,696 in California → Every provider in Ventura →
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- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
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- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Ilona Sylvester, M.D.'s NPI number?
Ilona Sylvester, M.D.'s National Provider Identifier (NPI) is 1215959291, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ilona Sylvester, M.D. located?
The NPPES record lists a practice address at 200 S Wells RD, Ventura, CA, 93004. Phone: (805) 659-1740. Providers update this record themselves, so call before visiting.
How can I verify Ilona Sylvester, M.D.'s license?
NPPES lists California license number A055316, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.